Tumour necrosis factor-alpha and lipopolysaccharide enhance interferon-induced tryptophan degradation and pteridine synthesis in human cells.

Biological Chemistry Hoppe-Seyler
G Werner-FelmayerH Wachter

Abstract

The capacity of recombinant interferon-alpha, -beta and -gamma, of bacterial lipopolysaccharide and of recombinant tumour necrosis factor-alpha to induce indoleamine 2,3-dioxygenase and synthesis of pteridines was studied in human peripheral blood mononuclear cells, human macrophages and normal dermal fibroblasts. The action of interferon-alpha and -beta on macrophages was supported by lymphocyte factors as indicated by the effect of these mediators in the absence or presence of lymphocytes. Tumour necrosis factor-alpha alone was ineffective in peripheral blood mononuclear cells and macrophages, but it significantly increased the action of all three interferon species on macrophages and fibroblasts. Lipopolysaccharide directly affected macrophages or dermal fibroblasts and enhanced the effect of interferon-gamma. However, in the presence of lymphocytes, the action of lipopolysaccharide was mediated via interferon-gamma.

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Citations

Apr 1, 1990·Journal of Neurology·D FuchsH Wachter
Dec 15, 2012·Biological Trace Element Research·Elif Seyda SaracTerken Baydar
Aug 24, 1991·Lancet·G Werner-FelmayerH Wachter
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